HP Designjet 4000 Service Manual - Page 22

Troubleshooting 3 The Printer is up and running, or may have a System Error at the end of the power-up sequence. For the Carriage PCA connection, perform the ScanAxis Test ⇒ Page 4-7: Signal 5V 24V 24V 24V 24V LED on Interconnect PCA OFF ON OFF OFF ON LED on PrintMech PCA ON ON OFF ON OFF Power Switch LED Blue Blue and Green Blue and Green Blue and Green Blue and Green Corrective Action „ Check the connection between the PSU and the Interconnect PCA. „ If connection OK, replace the Interconnect PCA ⇒ Page 8-64. „ Check the System Error that is produced and run the corresponding Diagnostic Test (either Scan-Axis or Media-Axis Test. „ Check the connection between the PSU and the PrintMech PCA and Interconnect PCA. „ If connection OK, run the Electronics Module Test to further diagnose the problem. „ Check the connection between the PSU and the Interconnect PCA. „ If connection OK, run the Electronics Module Test to further diagnose the problem. „ Check the connection between the PSU and the PrintMech PCA. „ If connection OK, run the Electronics Module Test to further diagnose the problem. 4 On the PrintMech PCA, if the 3V3 LED is ON, 5V LED is ON, ERIDANI LED is ON, VAUX LED is ON and the VAN LED is OFF, then try the following: „ Run the Electronics Module Test to further diagnose the problem. „ Replace the PrintMech PCA ⇒ Page 8-84. 5 If the Power Switch LED is Green and the 3V3 LED is ON, 5V LED is ON, ERIDANI LED is ON, VAUX LED is ON, VAN LED is ON and the VPOWER2 LED is OFF, then try the following: „ Check the connection between the PSU and the PrintMech PCA. „ Run the Electronics Module Test to further diagnose the problem. „ Replace the PrintMech PCA ⇒ Page 8-84. 1-16 hp designjet 4000 series printer service manual